Algodoo

Right to direct thrust right, left to direct thrust left. To go down, slowly alternate left and right and you will fall. It behaves very differently from most flying machines and takes a while to get the hang of, but it`s actually pretty maneuverable.

Pardon the bad artwork, if you think you can do better I`d love to see him drawn better.

And like anything using this technology, it occasionally refuses to fly. Go back and start again if that happens, it works about 3 out of four times for me but the failures come in streaks.